Abstract: A battery pack includes a battery pack housing having a lid joined to an open end via a fluid-impermeable seal. The battery pack further includes a battery module disposed within the battery housing and comprising a plurality of electrochemical cells. In addition, the battery pack includes a pressure compensation device positioned within the battery pack housing, the pressure compensation device having a first bladder fluidly coupled to a second bladder by a primary fitting. The battery pack housing is filled with a dielectric fluid. And further, the pressure compensation device has a second fluid.

Abstract: A battery pack includes a battery pack housing that is sealed and flooded with a dielectric fluid. In addition, the battery pack includes a battery module that is disposed in the battery pack housing, and a vent block that is disposed on the lid and communicates with an interior space of the battery pack housing. The vent block is configured to permit the battery pack to accommodate volume changes of the dielectric fluid within the battery pack housing.

Abstract: A battery pack includes a battery pack housing that is flooded with a dielectric fluid and sealed. The battery pack includes a vent block disposed on an outer surface of the housing, and a bladder disposed inside the housing that communicates with the vent block via a fitting. The bladder interior space includes air, and the bladder expands and contracts to accommodate volume changes of the dielectric fluid due to changes in the environment of the battery pack.

Abstract: A pouch cell (20A, 20) includes a generally rectangular cell housing (20, 21) formed of a metal laminated film, an electrode assembly (60) that is sealed within the cell housing (20, 21), and a current collector device disposed in the cell housing (20, 21). The electrode assembly (60) includes positive electrode portions alternating with negative electrode portions, the positive electrode portions and the negative electrode portions being separated by at least one separator and stacked along a stack axis (66). The current collector device is electrically connected to one of the positive electrode portions and the negative electrode portions and exits the cell housing (20, 21) via an opening (28, 428) formed in the cell housing (20, 21). The opening (28, 428) is formed in a side (22, 24) wall of the cell housing (20, 21) at a location spaced apart from the sealed joint (40) that closes the cell housing (20, 21) and at a location facing the stack axis (66).

Abstract: An electrochemical pouch cell includes a stacked or rolled arrangement of electrode plates disposed in a cell housing, and a lead tab that protrudes through the cell housing. The lead tab forms an electrical connection with the electrode plates within the cell and permits transfer of current out of the cell via an opening in a seal joint of the pouch cell housing. The lead tab has a configuration that improves reliability of the seal between the lead tab and the opening.

Abstract: An electrochemical pouch cell includes a stacked or rolled arrangement of electrode plates disposed in a cell housing, and a lead tab that protrudes through the cell housing. The lead tab forms an electrical connection with the electrode plates within the cell and permits transfer of current out of the cell via an opening in a seal joint of the pouch cell housing. The lead tab has a configuration that improves reliability of the seal between the lead tab and the opening.

Abstract: A pouch cell (20A, 20) includes a generally rectangular cell housing (20, 21) formed of a metal laminated film, an electrode assembly (60) that is sealed within the cell housing (20, 21), and a current collector device disposed in the cell housing (20, 21). The electrode assembly (60) includes positive electrode portions alternating with negative electrode portions, the positive electrode portions and the negative electrode portions being separated by at least one separator and stacked along a stack axis (66). The current collector device is electrically connected to one of the positive electrode portions and the negative electrode portions and exits the cell housing (20, 21) via an opening (28, 428) formed in the cell housing (20, 21). The opening (28, 428) is formed in a side (22, 24) wall of the cell housing (20, 21) at a location spaced apart from the sealed joint (40) that closes the cell housing (20, 21) and at a location facing the stack axis (66).